The copy could have a status of Lost or Long Overdue as a result of a different circ than the one that's being closed.

Our production system currently has 84 items with Lost and Paid status, but the most recent circ transaction is not closed and has stop_fines of LONGOVERDUE. Spot checking a few of these revealed an older circ (sometimes *much* older) with the same stop_fines and xact_finish that matches the copy's status_changed_time.

select stop_fines, count(circ.*) from action.circulation circ
join asset.copy ac on ac.id = circ.target_copy
where circ.xact_finish is null
and circ.checkin_time is null
and ac.status in (17)
group by 1

The query reveals an error in my accounting of the 84 items currently erroneously marked Lost and Paid in our production system. 26 of the 84 still open transactions where the copy status has been changed to Lost and Paid have stop_fines LOST.